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"These two sections are confined together by means of the tangs E E "on the ends of the bail E, which tangs @uiten tstrs @nicht ffice.

yBENJAMIN H. NAVES, or PHILADELPHIA, PENNSYLVANIA.

Letters .Patent No. 72,884, dated December 31, 1867.y

IMPROVEMENT IN PUMP-PISTONS.

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,TO ALL WH OM IT vMAY CONCERN Be it known that I, BENJAMIN H. NAVES, of Philadelphia, .in the county of Philadelphia., and State of, Pennsylvania, have invented an Improvement in Bumps; and I do declare the following to be a full, clear, and exact description thereoffreference being had to the accompanying drawings, making part of this Specification, in whichi l Figure 1 is a vertical central section taken through a pump-stock, showing the construction of the piston and valve-box chamber therein.

Figure 2 is a section taken vertically through the piston or.pump-buoket, showing the manner of constructing it, and applying the staple or bail to it.

' Figure 3 is a vertical sectional view of the valve-box.

Figure 4 is a section taken in the horizontal plane indicated by line :z: :c in fig. 2.

Similar letters of reference indicate corresponding parts in theseveral figures.

This invention relates t'o certain novel improvements on the construction of the chambers for receiving the valve-box and=piston or bucket; and also to a novel mode of constructing and putting-together these parts ,I for the purpose of preventing leakage, and the racking and rapidvwearing out of the pump and its stock, and to adapt the pump for use in factories where it its required to pump acids and alkalies from one tank to another; also for use in ships carrying coal, sand, ballast, oysters, or any other substance which would lrapidly wear out the old forms of pumps, as will be hereinafter explained. v

To enable others skilled in the art to understand my invention, I will describeits construction and-operation.

In the accompanying drawings, B reprcsents a penstock, which may be inade of wood or metal, and which is bored out in the usual manner, with this exception That portion of the penstock which is to re iv the valve-box D and pump-bucket A, is bored so as to have a conical or tapering chamber of prope receive a. lining, C,Y within the upper cylindrical portion of which the'pump-bucket Awel-ks. Thls which I shall malte cf-a harder and more durable material than the penstock B, is constructed, ig. 1, with its lower end taperinginside and outside-inside, for the purpose of having fittedl tigh valve-box D, and outside, for the purpose of 'fitting tightly against the bore of the penstock, thus leakage. This lining C is held down, after having been driven tightly into its seat, by means of p packed by means of the ring c, applied as shown in iig. 1. The valve-box D is, constructed with an an groove in its taperingexternal surface, into which is fitted a packing, d, of some suitable rnateriah'x ferm a perfectly tight joint when the box is driven down irmly into'its seat in the tapering lower Y casing, as shown in g..1-. This box is constructed with a hole through its centre for'the upward p `ge water, which hole is covered by the valve or clapper g, opcning'upwarcl into the interior ofthe shell or lining C below the pump-bucket A. A staple or bail, e, is secured to this valve-box by passing its tangs e e down through the box, vand' securing them by means of nuts, as shown in tig. 3. Upon one of the shoulders'ot` this bail e, at the junction of one of the tangs e with it, spurs z'z'may be formed, which embed themselves into the clapper and topiof the valve-box, and thus prevent this clapper from displacement. It will be seen, by reference todig. 3, that both tangse e of the bail e pass through India rubber, or other suitable elastic substance, so that the shoulders of the tangs and -bail abut against such substance. The pump-bucket A consists of two hollow'cylindrical sections, a a, between the ends ot' which the packingrings are confined, as shown in iig. 2.

pass through these two bucket-sections, and receive nuts upon their lower ends. One of said tangs passes through the dapper-valve g, andthe shoulder on 'this tang has spurs upon it, which, when the bail is secured firmly in place, embed themselves into the substance of the'clapper, and thus hold it firmly in place, as described for the bail of the stationary valve or clappe'r--box D. Bythus securing the bails E and e to their respective boxes, the clapper g and the packing-blocks prevent the escape of water through the holes, which are made through these boxes for receiving the tangs ot'- the bails. A

The old mode of nailing on the clappers is rendered'unnecessary, and the clappers can be renewed at pleasune, with very little labor, by simply removing the bail.

In carrying out my invention, I shall make the lining C, and the`pump-bucket A and valve-box D, oflignumvitae, which I have found to be very little aifected by acids or alkalies, and which, on account of its hnidness and closeness of grain, will last for a. great length of time.

Having described my' invention, what I claim as new,

1. The inside lining C, constructe witha. provision ator near its upper end for receivi 2. rEhe pump-bucketA, constructed with two partis, a a', with pa together, and the clapper held in place by means of the tangs on the en and desire to secure by Letters Patent, is-

d with a. tapering base for receiving the. clapper or valve-box, and also ng a. packing, c, substantially as described.

cking, b, between said parts,being confined ds of the b ail E, substantially as described.

BENJ. H. NAVES.

Witnesses:

FBAS. C. HAMPTON, JosEP A. TURNBULL. 

